Odd, that Mopar offered the D-Dart with a 'Free-Flowing Intake'.
Not sure what they meant by that, as the intake manifold was the same that was on the regular 273/235 HP 'Commando'.
The Golden Commando's 'Goldfish' and Doug Patterson 'Brand-X' Barracuda
utilized a modified intake when they ran in 1965.
They took off the intake, and bored out the secondary to 1 11/16" by
using a Bridgeport Milling Machine.
And they switched over to a Carter AFB #3447 600 CFM, the carburetor
from the 1963 426 'Stage I' Max-Wedge, which had a 1 7/16" Primary and 1 11/16" Secondary.
This switch was permitted by the NHRA, as they listed that Carter AFB
as a replacement Stock Class Carburetor for the 273/235 HP.
